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首页> 外文期刊>Journal of industrial and engineering chemistry >Desulfurization reaction model and experimental analysis of high sulfur coal under hydrogen atmosphere
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Desulfurization reaction model and experimental analysis of high sulfur coal under hydrogen atmosphere

机译：氢气氛下高硫煤的脱硫反应模型及实验分析

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摘要

The reaction between hydrogen and high-sulfur coal at high temperature was investigated. Crashed and sieved high-sulfur coal sample was placed in a 23 mm I.D. differential reactor. The release of hydrogen sulfide at run temperature and under different hydrogen atmospheres was recorded by a hydrogen sulfide detector. Desulfurization yield was obtained through the elemental analysis of residual char. The grain reaction and random pore models were modified to facilitate the description of reaction kinetics characteristics. Hydrogen was observed to promote the desulfurization rate considerably; i.e., more than 65% of sulfur in coal could be removed. The releasing curves of H2S in the hydropyrolysis process exhibited two peaks. The desulfurization process in the hydropyrolysis of high-sulfur coal could be regarded as two stages based on the evolution profiles of H2S. The first peak at 250-450 °C was derived from the desulfurization of aliphatic sulfide. The second peak at 450-650 °C was produced from the sulfur in pyrite and aromatic thiophenic structure. The desulfurization of high sulfur could be described more effectively with the grain reaction model than with the random pore model. The random pore model was only adopted in the initial stage of sulfur removal of high-sulfur coal under hydrogen atmosphere. The grain reaction model was adequate for the entire stage.
机译：研究了氢气与高硫煤在高温下的反应。将粉碎并过筛的高硫煤样品放置在23 mm I.D.差动电抗器。通过硫化氢检测器记录在运行温度下和在不同氢气气氛下硫化氢的释放。通过残炭的元素分析获得脱硫产率。修改了晶粒反应和随机孔模型，以方便描述反应动力学特征。观察到氢气大大促进了脱硫速度。即可以除去煤中65％以上的硫。加氢热解过程中H2S的释放曲线出现两个峰。基于H2S的演化规律，高硫煤加氢热解中的脱硫过程可分为两个阶段。 250-450°C处的第一个峰源自脂肪族硫化物的脱硫。 450-650°C处的第二个峰是由黄铁矿中的硫和芳族噻吩结构产生的。使用晶粒反应模型比使用随机孔模型可以更有效地描述高硫的脱硫。随机孔隙模型仅在氢气氛下高硫煤脱硫初期才采用。晶粒反应模型适合整个阶段。

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